Improved fruit-jar



UNITED STATES PATENT OFFICE.

JOHN n. MAsoN, or Naw YORK, N. v.

IMPROVED FRUIT-JAR.

Specification forming part of Letters Patent No. 86,089, dated January19, 18139.

To all whom it may concern:

Be it known that I, JOHN L. MAsoN, of the city, county, and State of NewYork, have invented a new and useful Improvement in SealingPreserve-Jars; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure l is a side view of my improved jar with its cover secured inplace. Fig. 2 is a side view of the jar with its cover removed, showingthe two gasket packing-rings in their places. Fig. 3 is an enlargeddiametrical section through the upper portion of the improved jar, itscover, gasket packing-rings, and screw fastening, all in their properplaces on the jar.

Similar letters of reference indicate correspondin g parts in the threefigures.

This invention relates to a new and improved mode of hermeticallysealing covers upon jars which are chiefly designed for preservingfruits, chemicals, and other substances which are decomposed orotherwise in) uriously affected by exposure to the air.

The object of my invention is to provide for the use of two india-rubberpacking-rings npon the outside of a jar, one fitting upon an annul. rshoulder and the other embracing an annular double-beveled rib or flangesurrounding the mouth of the jar above said shoulder, and in combiningtherewith aiiaringmouthed cap or cover, having a bead around its outeredge, and also a flexible metal screw-cap, which is constructed with aiiange upon its upper end, and adapted for screwing upon a thread formedon the outside of the jar and confining the cover down tightly in itsplace, so as to compress both packingrings, all as will be hereinafterexplained.

To enable others skilled in the art to understand my invention, I willdescribe its conruction and Operation.

'i the accompanying drawings, A represents ajar, and B its cover, whichI prefer to make of glass or other vitreous substance.

The upper portion of this jar has a screwthread, a, formed on it,adapted for receiving a flexible metal screw-ring, C, which is used toconfine the cover B firmly in its place upon the jar, as shown in Figs.l and 3.

This screw-thread, which winds around the outside surface of the jar,terminates at its upper end in a fiatv annular shoulder, b, of suitablewidth to receive and support a iiat gasket or packing-ring, C, made ofindia-rubber or other suitable material.

From the gasket-receiving shoulder rises an annular rib or iange, c,which surrounds the mouth of the jar, and receives around it, outside ofthe jar, an india-rubber gasket-packing, d, that extends from thegasket-packing c quite or near to the upper edge of the jar, as shown inFigs. 2 and 3.

The exterior surface of the rib or flange c is formed withdouble-beveled surfaces t' s', so as to leave an angle at the point iextending entirely around the rib or iiange c. This angle t' is aboutmidway between the shoulder b and top edge of the jar, and leaves therib or iiange thickest at this point.

The cap or cover B is made cup-shaped, with its rim h terminating at itslower end in an external annular bead or shoulder, g, adapted forreceiving upon it the flange Gr of screw-ring C, so that this ring canbe made to confine the cover down firmly upon its seats, as shown inFig. 3.

The internal surface s of the rim of cap B is cylindrical, or nearly so,and the cap at this point slightl greater in diameter than the externaldiameter of the rib or iiange c is in the horizontal plane t t. Thiscylindrical surface s terminates upwardly in an annular beveled surface,t, corresponding in bevel to the surface t above the angle t'.

The top surface of the cap or cover B may be flat, as shown, or it mayhave elevations formed on it by which to support the coverl upon anobject when a jar is inverted.

The screw-ring fastening C Gris made of thin sheet metal by spinning,swaging, or in any other suitable manner. It being thus made, itsflexibility will prevent it from breaking a jar or the cover thereof;and its iiange portion G, which draws upon the shoulder or bead g of thecover-rim, will yield and accommodate itself to the upper surface ofthis bead, so as to draw equally all around the cover and compress thetwo gasket packing-rings uniformly.

The parts thus constructed are put together in the following manner: Thefiat gasket-ring c is first stretched over the rib or Han ge e andpressed flatly upon its shoulder b, so that its inner edge will fitsnugly against this rib or flange at the angle formed by the junction ofthe upwardly-flaring surface s and shoulder b. The gasket or band-packing dis then stretched around the outer double-beveled surface of the ribor Harige c, as shown in Figs. 2 and 3.

The cover B is afterward put on the jar and drawn down tightly in placeby means of the flanged screw-ring G G, as shown in Figs. l and 3. Inthe act of screwing the ring C Gin place upon the jar the gasket c andgasket or band cl will both be compressed, and a tight joint will bemade, which will be inclosed by the screw-ring.

The effect of the beveled surfaces vt t upon i the gasket orpacking-band d above the angle at i is to compress this portion betweensaid surfaces t t', and cause the less portion of this band to swell andiill the space inclosed between the surfaces s s', and thereby make aclosely-packed joint above the shoulder b, and eft'ectually prevent theentrance of air into the jar or the escape of gas therefrom.

By this means the cover B will not be caused to adhere tightly to thegasket C by the action of acid generated or contained in this jar,

as such acid will be excluded from this gasket.

It will also be seen thatl while I Vhave a; double-packed joint I conineboth the packings outside of the jar, so that its contents cannot beinjured in the least by the packing,

nor can the metallic screw-ring be corroded by an acid confined inthejar.

I do not claim under this petition for apatcompressed Ving C G, andpackings c Yent a preserve-jar having a screw-thread terminatingupwardly in a gasket-receivin g shoulder, which is surmounted by anexternally plain-faced rib or flange, as these features are shown in anapplication for a patent filed in the United States Patent Ofce by me onthe 15th day of January, 1868; nor do I claim the exible metalscrew-ring, nor a cup-shaped cover,norY asimple beveled mouth to apreserve-jar, as `these features, separately considered, are old andwell known 5 nor do I claim, under this petition for a patent, a flangedcap or cover, in combination with a shouldered jar and screw-fastening,as such combination is .described and shown in another application filedby me.

What Ido claim as newrand desire to-secure by Letters Patent, is-fv Y l.A jar formed with a gasket-receiving shoulder, b, terminating upwardlyin a rib or iiange, e, having double-beveled surfaces s t', adapted forreceiving la packing-band, d, and a cover, B, which has aninternally-beveled surface, t', substantially as described.

2. An externally-beveled rib or ange, e, a shoulder, b,'and ascrew-thread, a, formed on a jar, in combination with a cover, B, havingan internally-beveled rim, and an external rib cr shoulder, g, on saidrim, screw-ring fastend, constructed and arranged substantially asdescribed.

:J OIEINl L. AMASON. Witnesses:

J ULiUs Einsam. RT. CAMPBELL.

